oxytocin noun. [ɒksɪ'tǝʊsɪn] E20.
[from OXYTOCIC + -IN¹.]
Medicine. A mammalian pituitary hormone which stimulates contraction of the uterus and the milk ducts, and is synthesized for use in inducing and accelerating labour and controlling postnatal bleeding.

■ oxytocinase noun an enzyme which inactivates oxytocin M20.

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